Borrowings - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2022	Sep. 30, 2020	Dec. 31, 2021
Debt Instrument [Line Items]
Advances from the Federal Home Loan Bank	$ 150,000
Period for Interest Deferral on Trust Preferred Securities	5 years
Premier Statutory Trust II [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Subordinated Long-term Debt	$ 15,500
Proceeds from Issuance of Trust Preferred Securities	$ 15,000
Coupon Rate on Preferred Securities, Period End	2.33%		1.70%
Preferred Securities Variable Interest Rate	LIBOR rate plus 1.5%
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Description	The Trust Preferred Securities and Subordinated Debentures mature on September 15, 2037, but can be redeemed at the Company’s option at any time now.
Premier Statutory Trust I [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Subordinated Long-term Debt	$ 20,600
Proceeds from Issuance of Trust Preferred Securities	$ 20,000
Coupon Rate on Preferred Securities, Period End	2.21%		1.58%
Preferred Securities Variable Interest Rate	LIBOR rate plus 1.38%
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Description	The Trust Preferred Securities and Subordinated Debentures mature on December 15, 2035, but can be redeemed at the Company’s option at any time now.
Subordinated Debt [Member]
Debt Instrument [Line Items]
Aggregate principal amount		$ 50,000
Subordinated notes, due date		Sep. 30, 2030
Subordinated notes, fixed Interest rate		4.00%
Subordinated notes, fixed interest rate, period		5 years
Basis spread on variable rate		3.885%
Proceeds from Issuance of Subordinated Long-term Debt		$ 48,700
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Advances from the Federal Home Loan Bank	$ 150,000		$ 0